QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#665515 | #7900. Gifts from Knowledge | qzez# | WA | 35ms | 59568kb | C++14 | 1.1kb | 2024-10-22 13:46:44 | 2024-10-22 13:46:46 |
Judging History
answer
#include<bits/stdc++.h>
#define LB lower_bound
using namespace std;using ll=long long;
const int N=1e6+5,mod=1e9+7;
int n,m;
string A[N];
vector<int> S[N];
int fa[N*2];
int GF(int x){return fa[x]^x?fa[x]=GF(fa[x]):x;}
void merge(int x,int y){
fa[GF(x)]=GF(y);
}
void Solve(){
scanf("%d%d",&n,&m);
for(int i=1;i<=n;i++) cin>>A[i];
iota(fa+1,fa+2*n+1,1);
for(int i=0;i<m;i++) S[i].clear();
for(int i=1;i<=n;i++){
for(int j=0;j<m&&j<=m-j-1;j++)if(A[i][j]=='1'||A[i][m-j-1]=='1') S[j].push_back(i);
}
for(int i=0;i<m&&i<=m-i-1;i++){
if(S[i].size()>2){puts("0");return;}
if(S[i].size()<=1) continue;
int x=S[i][0],y=S[i][1];
for(int j:{x,y}){
if(A[j][i]=='1'&&A[j][m-i-1]=='1'){
puts("0");return;
}
}
if(A[x][i]==A[y][i]) merge(x,y+n),merge(x,y+n);
else merge(x,y),merge(x+n,y+n);
}
for(int i=1;i<=n;i++) if(GF(i)==GF(i+n)){puts("0");return;}
int cnt=0;
for(int i=1;i<=2*n;i++) if(fa[i]==i) cnt++;
cnt>>=1;
ll ans=1;
for(int i=1;i<=cnt;i++) ans=ans*2%mod;
printf("%lld\n",ans);
}
int main(){
int t=1;
scanf("%d",&t);
while(t--) Solve();
return 0;
}
Details
Tip: Click on the bar to expand more detailed information
Test #1:
score: 100
Accepted
time: 8ms
memory: 58792kb
input:
3 3 5 01100 10001 00010 2 1 1 1 2 3 001 001
output:
4 0 2
result:
ok 3 number(s): "4 0 2"
Test #2:
score: 0
Accepted
time: 33ms
memory: 58452kb
input:
15613 10 10 0000000000 0000000000 0000000000 0000000000 0000000000 0000000000 0000000000 0000000000 0000000000 0000000000 15 8 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 1 5 00000 5 9 000000000 000000000 0000...
output:
1024 32768 2 32 32768 128 32 16 16 2 16384 16384 128 128 32768 8192 128 64 16384 2 4 2 4096 16 4096 1024 32768 32768 16384 8 128 2 16 4096 8192 32768 8192 8192 16 16384 16384 256 128 8 256 8 4096 512 2 4 32 32 2 64 512 1024 32768 32768 2 64 16384 16 8192 16 256 16 64 8192 8192 64 1024 2 32768 2 4 51...
result:
ok 15613 numbers
Test #3:
score: -100
Wrong Answer
time: 35ms
memory: 59568kb
input:
15759 9 6 000000 000000 000000 000000 000000 000000 000000 000000 000000 5 15 010000000000000 000000000000000 000000000000000 000100000000000 000100000000000 14 12 000000000000 000000000000 000000000000 000000000000 000000000000 000000000000 000000000000 000000000000 000000000000 000000000000 000000...
output:
512 16 16384 512 1024 4096 32768 4 2 512 512 512 512 8 2 256 16 4096 512 64 16 4096 512 32 32768 8192 32 2048 128 16 4096 64 32768 256 32 16384 8 512 32 2048 8 16 1024 2048 128 64 32 8 512 8 8192 256 8192 32768 2 8 512 512 256 32 2 2048 8192 8 64 8 2 16384 32768 32768 1024 4096 16384 16384 128 256 4...
result:
wrong answer 462nd numbers differ - expected: '8192', found: '16384'